/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.spark.sql

import org.apache.spark.SparkConf
import org.apache.spark.sql.internal.SQLConf
import org.apache.spark.sql.test.SharedSparkSession

class PostgreSQLDialectQuerySuite extends QueryTest with SharedSparkSession {

  override def sparkConf: SparkConf =
    super.sparkConf.set(SQLConf.DIALECT.key, SQLConf.Dialect.POSTGRESQL.toString)

  test("cast string to boolean") {
    Seq("true", "tru", "tr", "t", "    tRue   ", "    tRu   ", "yes", "ye",
      "y", "1", "on").foreach { input =>
      checkAnswer(sql(s"select cast('$input' as boolean)"), Row(true))
   }
    Seq("false", "fals", "fal", "fa", "f", "    fAlse   ", "    fAls   ", "no", "n",
      "0", "off", "of").foreach { input =>
      checkAnswer(sql(s"select cast('$input' as boolean)"), Row(false))
    }

    Seq("o", "abc", "").foreach { input =>
      intercept[IllegalArgumentException](sql(s"select cast('$input' as boolean)").collect())
    }
  }
}
